Calling seasteaders "right-wing extremists" is akin to calling a free-love commune of barterers a bunch of "left-wing extremists." Seasteaders aren't trying to push their ideologies on existing systems or people; they're trying to build their own minor utopian communities according to the personal principles of small government and minimal constraints on emigration. In seeking a tax haven, are they depriving the American social safety net of funding? Likely. But so are the many thousands of affluent Americans who emigrate to other countries every year because they disagree with American policies. No, The Baffler's vitriol is not over seasteaders' "exit" from the American economy. It's an anger and insecurity rooted in seasteaders' proposal of a genuine alternative vision for a utopian future, an alternative which competes with Marxist teleologies and therefore threatens leftism's assured belief that it alone owns the world of tomorrow.
Big Picture involves escape from the planet by a chosen few. The jumping-off point is Wellington, New Zealand. (Burroughs, The Western Lands)
Culture is “a sea of intersecting tides that sweeps us up in its currents, and we often feel unable to direct… our cultural wash,” Sistare writes; we must not let ourselves be passively swept, or to passively allow our worst impulses to, like growing winds, overly disturb a placid ocean. [C. T Sistare, Civility and Its Discontents: Essays on Civic Virtue, Toleration, and Cultural Fragmentation (Lawrence, Ka: University Press of Kansas, 2004), 197.]